Ionization energies of Ge-like ions from Kr V to Pd XV

Abstract

We use experimental energies of the 4p5s configurations in the Ge-like ions Kr V-Pd XV to derive improved values for the ionization energies. The ionization energies of these ions are presently only roughly known, mainly through the Dirac-Fock calculations of Rodrigues et al., At Data and Nucl Data Tables 2004;86:117. They have relatively large uncertainties. By using the observed energies of the 4p5s configurations as the starting point, we eliminate a large portion of the uncertainty. Based on observations at NIST with a 10.7-m grazing-incidence grating spectrograph, we also provide improved values for some of the energy levels.